//
//  CouponBoxViewController.swift
//  GME Remit
//
//  Created by Jeongbae Kong on 03/12/2019.
//Copyright © 2019 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit
import XLPagerTabStrip

protocol CouponBoxDelegate: class {
  func couponBoxView(
    _ viewController: CouponBoxViewController,
    didSelectModel model: CouponBoxModel?
  )
}

class CouponBoxViewController: UIViewController {
  
  // MARK: Properties
  
  weak var delegate: CouponBoxDelegate?
  
  private var couponList: [CouponBoxModel]? {
    didSet {
      let message = "possessed_coupon_number_text".localized().replacingOccurrences(
        of: "xxx", with: "\(couponList?.count ?? 0)")
      
      couponCount.text = message
      couponCount.font = .sanfrancisco(.regular, size: 15)
      
      if couponList?.count != 0 { //쿠폰리스트가 있으면,
        noCouponView.isHidden = true
      } else {
        noCouponView.isHidden = false
      }
      tableView.reloadData()
    }
  }
  
  var presenter: CouponBoxModuleInterface?
  private lazy var refreshControl = UIRefreshControl()
  
  // MARK: Computed Properties
  
  // MARK: IBOutlets
  
  @IBOutlet weak var tableView: UITableView!
  @IBOutlet weak var noCouponView: UIView!
  @IBOutlet weak var couponCount: UILabel!
  @IBOutlet weak var couponGuidelineText: UIButton!
  @IBOutlet weak var couponCountStackView: UIStackView!
  @IBOutlet weak var noCouponMessageLabel: UILabel!
  
  // MARK: VC's Life cycle
  
  override func viewDidLoad() {
    super.viewDidLoad()
    setup()
    setUI()
  }
  override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    presenter?.fetchCouponBox()
  }
  
  // MARK: IBActions
  @IBAction func couponGuidelineButton(_ sender: UIButton) {
//    presenter?.goCouponGuideline()
  }
}

// MARK: CouponBoxViewInterface
extension CouponBoxViewController: CouponBoxViewInterface {
  func setModel(with model: [CouponBoxModel]?) {
    couponList = model
  }
  
  func setError(with error: Error) {
    alert(message: error.localizedDescription)
  }
  
  func startLoading() {
    showProgressHud()
  }
  
  func endLoading() {
    hideProgressHud()
  }
}

// MARK: Other Functions
extension CouponBoxViewController {
  private func setup() {
    initDelegate()
    addRefreshControlCollectionView()
    noCouponMessageLabel.text = "no_coupon_text".localized()
    // all setup should be done here
  }
  
  private func initDelegate() {
    tableView.dataSource = self
    tableView.delegate = self
  }
  private func setUI() {
    couponGuidelineText.setTitle("coupon_guideline_title_text".localized(), for: .normal)
    couponGuidelineText.titleLabel?.font = .sanfrancisco(.regular, size: 13)
    couponGuidelineText.backgroundColor = .clear
    couponCountStackView.backgroundColor = .clear
  }
  
  private func addRefreshControlCollectionView() {
    let colorOption = [NSAttributedString.Key.foregroundColor : UIColor.themeWhite]
    
    let title = NSAttributedString(string: "pull to refresh", attributes: colorOption)
    
    refreshControl.attributedTitle = title
    refreshControl.backgroundColor = .themeBlue
    refreshControl.tintColor = .themeWhite
    refreshControl.addTarget(self, action: #selector(refresh), for: .valueChanged)
    
    if #available(iOS 10.0, *) {
      tableView.refreshControl = refreshControl
    } else {
      tableView.addSubview(refreshControl)
    }
  }
  
  @objc
  private func refresh() {
    self.presenter?.fetchCouponBox()
    
    DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {[weak self] in
      self?.tableView.refreshControl?.endRefreshing()
    }
  }
  
}

// MARK: - XLPagerTabStrip'`s IndicatorInfoProvider
extension CouponBoxViewController: IndicatorInfoProvider {
  func indicatorInfo(for pagerTabStripController: PagerTabStripViewController) -> IndicatorInfo {
    return IndicatorInfo.init(title: "couponbox_title_text".localized())
  }
}

// MARK: - UITableViewDataSource
extension CouponBoxViewController: UITableViewDataSource {
  func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return couponList?.count ?? 0
  }
  
  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    guard let cell = tableView.dequeueReusableCell(withIdentifier: "CouponCell") as? CouponCell else {
      return CouponBoxTableViewCell()
    }
    cell.setModel(couponList?[indexPath.row])
    return cell
  }
}

extension CouponBoxViewController: UITableViewDelegate {
  func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
    let result = UIView()

    // recreate insets from existing ones in the table view
    let insets = tableView.separatorInset
    let width = tableView.bounds.width - insets.left - insets.right
    let sepFrame = CGRect(x: insets.left, y: -0.5, width: width, height: 0.5)

    // create layer with separator, setting color
    let sep = CALayer()
    sep.frame = sepFrame
    sep.backgroundColor = tableView.separatorColor?.cgColor
    result.layer.addSublayer(sep)

    return result
  }
}